Cholecalciferol

Cholecalciferol (/ˌkoʊləkælˈsɪfərɒl/) (vitamin D₃) is one of the five forms of vitamin D. It is a secosteroid, that is, a steroid molecule with one ring open. Cholecalciferol is inactive: it is converted to its active form by two hydroxylations: the first in the liver, the second in the kidney, to form calcitriol, whose action is mediated by the vitamin D receptor, a nuclear receptor which regulates the synthesis of hundreds of enzymes and is present in virtually every cell in the body.

单词	Calciol
释义	Calciol 英语百科 Cholecalciferol Cholecalciferol (/ˌkoʊləkælˈsɪfərɒl/) (vitamin D₃) is one of the five forms of vitamin D. It is a secosteroid, that is, a steroid molecule with one ring open. Cholecalciferol is inactive: it is converted to its active form by two hydroxylations: the first in the liver, the second in the kidney, to form calcitriol, whose action is mediated by the vitamin D receptor, a nuclear receptor which regulates the synthesis of hundreds of enzymes and is present in virtually every cell in the body.
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Calciol

Cholecalciferol